Diff: main.cpp

Revision:

0:18a657d5431f

Child:

1:bf2afd6890a2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jun 29 21:34:20 2015 +0000
@@ -0,0 +1,275 @@
+// ---------------------------------------------
+// MultiTech Thermostat & Fan Demo (Sensor unit)
+//
+// This program runs on a MultiTech mDot with:
+//   - 2 Grove COM08211P push buttons
+//   - 1 Grove SEN23292P v1.2 temperature sensor
+// ---------------------------------------------
+
+#include "mbed.h"
+#include "mDot.h"
+#include "PinDetect.h"
+
+mDot* dot;
+Ticker ledTick;
+Ticker temperatureMonitorTick;
+Ticker periodicSendTick;
+
+PinDetect up_button(PB_1);
+PinDetect down_button(PB_0);
+AnalogIn temperatureSensor(PC_1);
+DigitalOut transmitLED(LED1);
+DigitalOut buttonPressLED(PA_1);
+
+// Configuration variables
+static std::string config_network_name = "mts-fan-demo1";
+static std::string config_network_pass = "multitech";
+static uint8_t config_frequency_sub_band = 2;
+
+//Global Variables
+static uint16_t setPoint = 21;       //21 C is standard room temp
+static volatile bool timeToReadTemperature = true;
+static volatile bool dataChanged = true;
+static volatile bool thermostatActivated = false;
+static uint16_t sentSetPoint;
+
+//Function prototypes
+void ledTock();
+void periodicSendTock();
+void temperatureMonitorTock();
+void up_button_callback();
+void down_button_callback();
+void printError(mDot* dot, int32_t returnCode);
+void printVersion();
+bool setFrequencySubBand(uint8_t subBand);
+bool setNetworkName(const std::string name);
+bool setNetworkPassphrase(const std::string passphrase);
+bool setPower(uint8_t power);
+bool setAck(uint8_t retries);
+bool joinNetwork();
+bool send(const std::string text);
+
+
+int main()
+{
+    //Start LED startup sequence
+    ledTick.attach(&ledTock, 0.1);
+
+    printf("\r\n\r\n");
+    printf("=====================================\r\n");
+    printf("MTS Thermostat/Fan Demo (Sensor unit)\r\n");
+    printf("=====================================\r\n");
+    printVersion();
+
+    // get the mDot handle
+    dot = mDot::getInstance();
+
+    // reset to default config so we know what state we're in
+    dot->resetNetworkSession();
+    dot->resetConfig();
+
+    // set up the mDot with our network information
+    setNetworkName(config_network_name);
+    setNetworkPassphrase(config_network_pass);
+    setFrequencySubBand(config_frequency_sub_band);
+    setPower(7);    // Reduce latency for 868 units
+    setAck(0);      // Disable ack for less latency
+
+    while (!joinNetwork()) { wait(2); dot->resetNetworkSession(); }
+
+    // Stop LED startup sequence & configure them for operation
+    ledTick.detach();
+    transmitLED = 1;
+    buttonPressLED = 1;
+
+    // Configure timers
+    periodicSendTick.attach(&periodicSendTock, 5*60);
+    temperatureMonitorTick.attach(&temperatureMonitorTock, 0.15);
+
+    // Setup Interrupt callback function
+    up_button.attach_deasserted(&up_button_callback);
+    down_button.attach_deasserted(&down_button_callback);
+
+    // Start sampling buttons using interrupts
+    up_button.setSampleFrequency();
+    down_button.setSampleFrequency();
+
+    uint16_t temperature = 0;
+    while (1) {
+        if (timeToReadTemperature) {
+            uint16_t B = 4250;            //B value of the thermistor
+            uint16_t analogReading;
+            float resistance;
+
+            analogReading = temperatureSensor.read_u16();
+
+            // get the resistance of the sensor
+            resistance=(65534-analogReading)*10000/analogReading;
+            // convert to temperature via datasheet
+            temperature=1/(log(resistance/10000)/B+1/298.15)-273.15;
+            //printf("read: %d, res: %d, temp: %d,set: %d\r\n", analogReading, (uint16_t)resistance, temperature, setPoint);
+
+            if (!thermostatActivated && temperature > setPoint) {
+                thermostatActivated = true;
+                dataChanged = true;
+            }
+            else if (thermostatActivated && temperature < setPoint) {
+                thermostatActivated = false;
+                dataChanged = true;
+            }
+
+            timeToReadTemperature = false;
+        }
+
+        if (dataChanged) {
+            char latestData[100];
+            transmitLED = 1;
+            sentSetPoint = setPoint;
+            sprintf(latestData, "temp: %d,set: %d", temperature, sentSetPoint);
+            printf("%s\r\n", latestData);
+
+            if (send(latestData)) {
+                dataChanged = false;
+            }
+            transmitLED = 0;
+        }
+    }
+}
+
+
+void ledTock() {
+    transmitLED = !transmitLED;
+    buttonPressLED = !buttonPressLED;
+}
+
+void periodicSendTock() {
+    dataChanged = true;
+}
+
+void temperatureMonitorTock() {
+    timeToReadTemperature = true;
+
+    if (sentSetPoint != setPoint) {
+        dataChanged = true;
+    }
+}
+
+void up_button_callback() {
+    if (setPoint < 51) {
+        setPoint += 1;
+        buttonPressLED = !buttonPressLED;
+        dataChanged = true;
+    }
+}
+
+void down_button_callback() {
+    if (setPoint > 0) {
+        setPoint -= 1;
+        buttonPressLED = !buttonPressLED;
+        dataChanged = true;
+    }
+}
+
+
+void printVersion()
+{
+    printf("%s\r\n\r\n", dot->getId().c_str());
+}
+
+bool setFrequencySubBand(uint8_t subBand)
+{
+    int32_t returnCode;
+    printf("Setting frequency sub band to '%d'...\r\n", subBand);
+    if ((returnCode = dot->setFrequencySubBand(subBand)) != mDot::MDOT_OK) {
+        printError(dot, returnCode);
+        return false;
+    }
+    return true;
+}
+
+bool setNetworkName(const std::string name)
+{
+    int32_t returnCode;
+    printf("Setting network name to '%s'...\r\n", name.c_str());
+    if ((returnCode = dot->setNetworkName(name)) != mDot::MDOT_OK)
+    {
+        printError(dot, returnCode);
+        return false;
+    }
+    return true;
+}
+
+bool setNetworkPassphrase(const std::string passphrase)
+{
+    int32_t returnCode;
+    printf("Setting passphrase to '%s'...\r\n", passphrase.c_str());
+    if ((returnCode = dot->setNetworkPassphrase(passphrase)) != mDot::MDOT_OK)
+    {
+        printError(dot, returnCode);
+        return false;
+    }
+    return true;
+}
+
+bool setPower(uint8_t power)
+{
+    int32_t returnCode;
+    printf("Setting tx power to '%d'...\r\n", power);
+    if ((returnCode = dot->setTxPower(power)) != mDot::MDOT_OK) {
+        printError(dot, returnCode);
+        return false;
+    }
+    return true;
+}
+
+
+bool joinNetwork()
+{
+    int32_t returnCode;
+    printf("\r\nJoining network...\r\n");
+    if ((returnCode = dot->joinNetworkOnce()) != mDot::MDOT_OK) {
+        printError(dot, returnCode);
+        return false;
+    }
+    printf("Network Joined!\r\n");
+    return true;
+}
+
+bool setAck(uint8_t retries)
+{
+    int32_t returnCode;
+    printf("Setting ack to '%d'...\r\n", retries);
+    if ((returnCode = dot->setAck(retries)) != mDot::MDOT_OK)
+    {
+        printError(dot, returnCode);
+        return false;
+    }
+    return true;
+}
+
+bool send(const std::string text)
+{
+    int32_t returnCode;
+    uint32_t timeTillSend = dot->getNextTxMs();
+    if (timeTillSend != 0) {
+        printf("waiting %lu ms to send\r\n", timeTillSend);
+        return false;
+    }
+
+    printf("Sending data...  ");
+    std::vector<uint8_t> data(text.begin(), text.end());
+    if ((returnCode = dot->send(data, 1)) != mDot::MDOT_OK)
+    {
+        printError(dot, returnCode);
+        return false;
+    }
+    printf("Data sent!\r\n");
+    return true;
+}
+
+void printError(mDot* dot, int32_t returnCode)
+{
+    std::string error = mDot::getReturnCodeString(returnCode) + " - " + dot->getLastError();
+    printf("%s\r\n", error.c_str());
+}
+